139 lines
5.1 KiB
GDScript
139 lines
5.1 KiB
GDScript
extends Node
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## Wind beds plus sparse, localised foliage and wildlife field recordings.
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const ROOT := "res://assets/sounds/surface/"
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const VOICE_LIMIT := 3
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const WIND_DB := [-18.0,-17.0,-16.0,-13.0,-12.0,-14.0]
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var source: Control
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var _streams: Dictionary = {}
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var _wind: AudioStreamPlayer
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var _foliage: AudioStreamPlayer
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var _world_audio: Node2D
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var _listener: AudioListener2D
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var _voices: Array[AudioStreamPlayer2D] = []
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var _rng := RandomNumberGenerator.new()
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var _elapsed := 0.0
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var _local_refresh := 0.0
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var _near_trees: Array[Vector2] = []
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var _density := 0.0
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var _biome := 0
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var _oxygen := 100.0
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var _next_gust := 10.0
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var _next_leaves := 6.0
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var _next_creak := 20.0
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var _next_fauna := 12.0
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var _last_leaf := ""
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var _last_bird := ""
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var played_count := 0
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func _ready() -> void:
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process_mode = Node.PROCESS_MODE_ALWAYS
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_biome = int(source.world.data.landscape.index)
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_oxygen = float(source.progress.active_profile.get("oxygen",100))
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_rng.seed = int(source.progress.visit_seed)^0x4e415455
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for id in ["wind_loop","wind_gust","foliage_loop","leaves_1","leaves_2","leaves_3","branch_creak_1","branch_creak_2","bird_1","bird_2","bird_3","insects","marsh_call"]:
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_streams[id] = load(ROOT+id+".wav")
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_wind = _bed("wind_loop")
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_foliage = _bed("foliage_loop")
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_world_audio = Node2D.new()
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_world_audio.name = "NatureAudioWorld"
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_world_audio.process_mode = Node.PROCESS_MODE_ALWAYS
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source._surface_viewport.audio_listener_enable_2d = true
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source._surface_viewport.add_child(_world_audio)
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_listener = AudioListener2D.new()
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_world_audio.add_child(_listener)
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_listener.make_current()
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for index in VOICE_LIMIT:
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var voice := AudioStreamPlayer2D.new()
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voice.name = "NatureVoice%d" % index
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voice.max_distance = 1050
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voice.attenuation = 1.1
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voice.panning_strength = 0.65
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_world_audio.add_child(voice)
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_voices.append(voice)
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_refresh_local()
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_next_gust = _rng.randf_range(8,16)
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_next_fauna = _rng.randf_range(7,15)
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func _bed(id: String) -> AudioStreamPlayer:
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var bed := AudioStreamPlayer.new()
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var stream := (_streams[id] as AudioStreamWAV).duplicate() as AudioStreamWAV
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stream.loop_mode = AudioStreamWAV.LOOP_FORWARD
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stream.loop_end = roundi(stream.get_length()*stream.mix_rate)
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bed.stream = stream
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bed.volume_db = -48
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add_child(bed)
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bed.play()
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return bed
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func _refresh_local() -> void:
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_near_trees.clear()
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for tree in source.world.data.trees:
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if source.lander.position.distance_squared_to(tree.position) < 560.0*560.0:
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_near_trees.append(tree.position)
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_density = clampf(float(_near_trees.size())/22.0,0,1)
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func fauna_choices() -> Array[String]:
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if _oxygen < 12: return []
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match _biome:
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2: return ["marsh_call","insects","bird_2"]
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4: return ["insects"]
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5: return ["bird_3"]
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_: return ["bird_1","bird_2","bird_3","insects"]
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func _play(id: String, position: Vector2, level: float) -> bool:
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for voice in _voices:
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if voice.playing: continue
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voice.stream = _streams[id]
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voice.position = position
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voice.volume_db = level
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voice.pitch_scale = _rng.randf_range(0.95,1.03)
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voice.play()
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played_count += 1
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return true
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return false
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func _tree_position() -> Vector2:
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return _near_trees[_rng.randi_range(0,_near_trees.size()-1)]
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func _process(delta: float) -> void:
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if not is_instance_valid(source) or not is_instance_valid(_listener): return
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_elapsed += delta
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_local_refresh += delta
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_listener.position = source.lander.position
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if _local_refresh > 0.65:
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_local_refresh = 0
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_refresh_local()
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var gust := sin(_elapsed*0.19)*1.4+sin(_elapsed*0.073)*0.8
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var engine_mask := -3.0 if source.engine_thrust_active() else 0.0
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_wind.volume_db = move_toward(_wind.volume_db,WIND_DB[_biome]+gust+engine_mask,delta*26)
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var leaf_target := -60.0 if _near_trees.is_empty() else lerpf(-34,-23,_density)+gust+engine_mask
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_foliage.volume_db = move_toward(_foliage.volume_db,leaf_target,delta*8)
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if _elapsed >= _next_gust:
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_play("wind_gust",_listener.position+Vector2(_rng.randf_range(-250,250),-120),-23.0 if _biome < 3 else -20.0)
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_next_gust = _elapsed+_rng.randf_range(18,38)
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if _elapsed >= _next_leaves:
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if not _near_trees.is_empty():
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var choices := ["leaves_1","leaves_2","leaves_3"]
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choices.erase(_last_leaf)
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_last_leaf = choices[_rng.randi_range(0,choices.size()-1)]
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_play(_last_leaf,_tree_position(),-14.0)
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_next_leaves = _elapsed+_rng.randf_range(9,20)
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if _elapsed >= _next_creak:
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if not _near_trees.is_empty(): _play("branch_creak_%d" % _rng.randi_range(1,2),_tree_position(),-17.0)
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_next_creak = _elapsed+_rng.randf_range(26,52)
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if _elapsed >= _next_fauna:
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var choices := fauna_choices()
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if choices.size() > 1: choices.erase(_last_bird)
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if not choices.is_empty():
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_last_bird = choices[_rng.randi_range(0,choices.size()-1)]
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var at := _listener.position+Vector2.from_angle(_rng.randf_range(-PI,PI))*_rng.randf_range(200,520)
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_play(_last_bird,at,-15.0 if _biome < 3 else -19.0)
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_next_fauna = _elapsed+_rng.randf_range(15,33)*(2.0 if _biome in [3,4,5] else 1.0)
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func _exit_tree() -> void:
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if is_instance_valid(_wind): _wind.stop()
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if is_instance_valid(_foliage): _foliage.stop()
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for voice in _voices:
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if is_instance_valid(voice): voice.stop()
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if is_instance_valid(_world_audio): _world_audio.queue_free()
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